The furnace is your home’s single largest and most important appliance. You wouldn’t drive your car 10,000 miles without an oil change. Likewise, it’s not a good idea to go years without inspecting, maintaining and, if necessary, repairing your furnace.
Al’s Tip: Clean or replace the air filter every one to two months so you’re not making your furnace run harder and longer. And don’t obstruct the airflow near hot air registers, return air grills, radiators, and baseboard heaters.